Reversing rolling-mill



(No Model.)4 s sheets-sheet 1.

J. Q. Ev'BRs-ON.

REVBRSING ROLLING MILL.- l

Patented Nov. 8, 1887.

"l".- "m u.

n, rimas Phmwummpw. www o. c.

(No Model.) BSheetS--Sheet 2.

J. Q. EVERSONQ REVERSINGv ROLLING MILL.

No. 872,747. Patented Nov. 8, 1887. |"'l f vV [HMH-ras SE s .n vz ffm A #mhff 4reversing mechanism.

IIN-ire PATENT rines,

JOHNQ. nvERsoN, or PrrrsBURe, PENNSYLVANIA.

REVERSING ROLLING-MILL.

SPECIFICATION forming part of Letters Patent No. 372,747, dated November 8, 1887.

Application filed March 13, 1887.

To aZZ whom it may concern:

Be it known that I, JOHN Q. EvERsoN, a citizen of the United States, and a resident of the city of Pittsburg, in the county of Allegheny and State of Pennsylvania, have invented a certain new and useful Improvement in Reversing Rolling Mills; and I do hereby declare the following to be a full, clear, and exact description thereof, reference being had to the accompanying drawings, forming a part thereof, in whichv Figure l indicates a side elevation of a reverse plate-rolling mill adapted-to roll plates both backward and forward without reversing the motion of the mill or of its driving-gear. Fig. 2 indicates a plan view of the same, together with its driving-gear. Fig. 3 indicates a front elevation of the reverse rolling-mill with the front table removed and bloomingrolls substituted inplace of plate-rolls.

Like letters of reference indicate like parts wherever they occur.

The object of my invention is to roll blooms, plates, die., both backward and forward, or by reverse rolling operations without reversing the motion of the mill, of the gear, or of the driving-engines. Heretofore in all cases it has always been necessary to reverse the motion of the train in order to subject the bloom or plate to the reverse rolling operation. rlhis necessity has involved the use of double reversing engines or of costly and complicated In all cases the entire train and the driving apparatus constituted a complicated and costly apparatus. large proportion of the time and power during the rolling operation was taken up in overcoming the inertia of the mechanism in starting the train at each successive pass and in overcoming the momentum of the mechanism. rlhe mechanism was also subjected to repeated series of sudden rapid heavy jars, shocks, and strains during each reversal; and other defects of the ordinary reversing-mill are, first, itcannot be run at a uniform rate of speed; second, it is impracticable to run it at a high rate of speed on account of the necessity of reversing the entire train.

In the use of my invention I propose to do away with all these disadvantages and am enabled to do so,because the motion ofthe engine,

A very` of the driving-gear, couplings, and train is never reversed in making reverse passes through my reverse rolling-mill. I obviate the necessity of reversing the mill, dto., by the following simple expedient: I take two sets of ordinary plate or blooming rolls and mount them in ordinary plate or blooming housings, place o'ne set of housings directly in front of the other, as shown in Figs. 1 and 2, and provide each set of rolls with the ordinary drivingpinions mounted in ordinary roll-pinion standards. The rolls are driven by the usual coupling-boxes, (not shown,) which are adjusted in the usual manner over the ends of the rolls and over the ends of the spindles of the driving-pinions. One of these pinions is coupled by an ordinary coupling-box to one end of the main driving-shaft. The main shaft is provided with a driving-pinion, which meshes into and communicates a reverse motion to a similar pinion mounted on an auxiliary shaft to the rear of the main driving shaft and in line with the driving-pinions of the rear set of rolls, so that when power is applied to the main shaft to rotate the first set of rolls in one direction a reverse rotary motion may be imparted at the same time to the other set of rolls. In practice, therefore, I use two sets of rolls, 1ocated as described and rotating in opposite directions.

In the drawings, A A indicate an ordinary set of housings. A A indicate the second set located directly in the rear thereof.

B B B indicate a feeding-table located at the front between and at the rear of the rolling apparatus, and is to be actuated in the usual manner by a small auxiliary feed-table, reversing-engine, or apparatus (not shown) in the usual manner; or the reversing-engine or apparatus may be dispensed with and the feedtable be merely provided with friction-rollers.

C C indicate the standards or housings of the roll-driving pinions D D.

E indicates the main driving shaft,which is suitably journaled in any ordinary manner with the driving-gear E', which meshes into and communicates the reverse motion to a similar pinion, E', mounted on an auxiliary to the journal-boxes of the upper rolls and ICO carry weights B5 at their lowei` ends, whereby the upper rolls are held in their proper rela` tive positions.

The operation of the platemill is as follows: The couplings being arranged in place, the rolls are adjusted so as to force the upper roll of each ofthe first pair down nearer the lower roll than the upper roll of the second set. The

metal passes through the first set, an d is carried' by its momentum or by the motion imparted to the rollers between the housings to the seeond set of rolls, and as the rollers of the table are elevated slightlyahove the plane of the lower rolls the metal passes through the second set without coming in contact with the face of either of the rolls. The second set of rolls are then screwed down, so as to throw the upper roll nearer the lower. Then the upper roll of the other set is adjusted for the pass just finished. The bloom or plate is then forced forward until it comes into the bite of the second or rear set. The upper rolls ofeach set are forced downwardly by means of a serewpost, A,working in the upper portions of the housings, and carrying gears A at their upper ends, whichI mesh with pinions A5 on a handwheel, A". The reverse motion of this set rolls the bar through, and as the thickness of the metal is reduced the latter passes through the first set without coming into contact with either of its rolls. The first set of rolls is then screwed down, so as to reduce the piece in the next pass, and the third pass takes place under the conditions described in reference to the first pass. The fourth pass-that is, the second reverse pass-takes place under the conditions ofthe second-that is, the first reverse pass, before described-and the rolling operation is continued by alternately screwing down the different sets and operating alternately on the plate by the two sets of rolls until the metal is reduced to the required thickness.

Then it is desired to use my improvement for blooming, the apparatus and operation are the same, except that grooved rolls are used of any suitable form, and it is imperative that the grooves shall be of greater width in every instance than the width of the piece which enters the pass, in order that the metal may not strike or bind against the collars or the side walls of the grooved rolls, which are rotating in a reverse direction to that in which the metal is passing, as will be readily understood bya skilled mechanic in the art to which my invention relates.

Among the many advantages are the following: It can be put into practice with very little expense by any mill-owner who has two sets of ordinary rolls and housings, which he can arrange in the manner indicated and gear together so as to rotate in opposite directions by means ofthe ordinary boxes, spindles, and gearing always in use or lying about a mill. The ordinary mill-engine and flywheel may be used to furnish motive power, so that in many instances old machinery may be used, and it may not be necessary to build any new machinery, except the feeding and reversing table, which will involve only a comparatively small sum. Other advantages are that my mill does not possess any of the disadvantages before enuinerated ofthe ordinary reversing-mills.

Having described my invention, what I claim, and desire to secure by Letters Patent, is-

l. A reversing rollinginill provided with two sets of rolls mounted in housings provided with roll-adjusting mechanism, one set being immediately infront ofthe otherand adapted to be rotated in reverse directions, constructed to operate substantially as herein set forth.

2. A reversing rolling-mill having two sets of rolls mounted in suitable housings provided with roll-adjusting mechanism, said iolls being adapted te be rotated in opposite directions, and arranged, as specified, and having a feeding or reversing feedingtablcs, substantially as herein set forth.

3. A reversing rolling-inill consisting of two ordinary mills arranged, as specified, in combination with two driving -shafts, and with suitable intermediate connecting mechanism adapted to rotate the two ordinary mills in opposite directions, substantially as and for the purpose herein set forth.

4. The combination ofthe two mills adapted to be rotated in opposite directions, the two driving-shafts and intermediate mechanism, and the reversingtablcs, substantially as herein set forth.

JOHN Q. EVERSON.

"Witnesses:

JNO. H. HONEY, FRANK M. Rnnsn,

IOO 

